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Koji Kawakita |
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Akihito Otani |
2012-01-17 |
| 8050558 |
Optical signal sampling apparatus and method and optical signal monitor apparatus and method using the same |
Akihito Otani |
2011-11-01 |
| 8041211 |
Optical signal quality monitoring apparatus and method |
Akihito Otani |
2011-10-18 |
| 8019218 |
Optical signal monitoring apparatus and method |
Akihito Otani |
2011-09-13 |
| 6618401 |
Variable wavelength light source |
Toshiyuki Ozaki, Masanori Takizawa |
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2000-05-30 |
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Optical spectrum analyzer with high performance measurement function |
Yoji Sonobe |
1991-02-26 |
| 4799789 |
Chromatic dispersion measuring system for optical fibers |
Takeshi Tsukamoto, Hidetoshi Miyao |
1989-01-24 |
| 4799790 |
Chromatic dispersion measuring system for optical fibers |
Takeshi Tsukamoto |
1989-01-24 |